is there a method to enforce qt6 on all ports requiring qt

From: void <>
Date: Sun, 24 Sep 2023 17:46:40 UTC

I'd like to (try to) build any required qt-involved port with qt6,
If it's qt5-only, I'd like it to fail to build. I don't want qt5 at all.

Is there a way to do this? I'm using poudriere-devel.